vliegtuigcoatings

Vliegtuigcoatings, in English aircraft coatings, are protective and decorative finishes applied to aircraft to guard metal alloys and composite materials such as CFRP from corrosion, weathering, UV radiation, and chemicals encountered in flight and ground operations. The finish also contributes to aging and drag management by providing a smooth surface and color/branding. Coatings must perform over a wide temperature range and adhere to substrates such as aluminum alloys and carbon-fiber reinforced polymers.

Typical coating systems follow a multi-layer approach: a primer to improve adhesion and corrosion resistance, an intermediate layer if needed, and a topcoat that provides color and UV protection. Primers may be epoxy-based or zinc-rich to inhibit corrosion; chromate-containing primers were common but increasingly replaced with chromate-free formulations due to environmental concerns. Topcoats are often two-component polyurethanes or fluorinated coatings with good chalk resistance and gloss, sometimes reinforced with light-reflective pigments for heat management. Waterborne and low-VOC systems are increasingly adopted to meet regulatory requirements.

Surface preparation is critical and includes cleaning, degreasing, and often mechanical or chemical pretreatment such as phosphates or conversion coatings; for metal substrates, blast cleaning to a defined cleanliness level is common. Application methods include spray or electrostatic deposition in controlled environments; curing depends on coating chemistry and may require elevated temperature. Film thickness is controlled to achieve the specified dry film thickness for corrosion protection and durability.

Maintenance involves regular inspection for chipping, blistering, and discoloration, followed by localized repair or full repainting as part of scheduled maintenance. Coating programs are governed by aviation authorities (e.g., FAA, EASA) and standards bodies, and are subject to environmental regulations restricting certain chromates and VOCs. Advances focus on chromate-free systems, improved adhesion, and lighter, more durable, and repair-friendly formulations.